Ballscrews or rack and pinion? What module of rack and pinion is the best?

**masinecc** · 13-04-2015

Hello guys , i am building a cnc router, my Y-axis travel gonna be 2600mm. First i decided to use a ballscrews RM2505 but now i am scared that my travel is too long and my ballscrews can cause vibrations on such a long distance. What is ur recommendation should i go with rack and pinion and what module ? Is a rotating ball nut rational to use in this case? Thanks in advance !

**Clive S** · 13-04-2015

Here is one example http://www.mycncuk.com/threads/3340-...+ball+jonathan ..Clive

**masinecc** · 13-04-2015

Whic one is beeter to go , the RM2505 or RM2510?

**JAZZCNC** · 13-04-2015

Originally Posted by masinecc

Whic one is beeter to go , the RM2505 or RM2510?

Ok well if this for Wood router then you absolutley don't want Rm2505 as it will be far too slow.

Now because of the length of travel then I suggest you go with Rm2525 and use a ratio 2:1 on the screws. This will help you with length as the ratio means the screw is turning half the speed of Rm2510 but giving similair feedrate so less likely to whip and Vibrate. The ratio will increase torque and resolution but lower the RPM but because you have larger 25mm pitch then it will give roughly the same feeds has RM2510.